A chromium-based metal organic framework as a potential high performance adsorbent for anaesthetic vapours

Abstract

In this work, a chromium-based metal organic framework (Cr-MOF) was synthesized, characterized and tested for the adsorption of a model highly ozone-depleting anaesthetic (sevoflurane). Adsorption isotherms were measured at different temperatures e.g., 283, 298, 313 and 328 K on both Cr-MOF and a conventionally used reference adsorbent. At the temperatures used in this study, the Cr-based MOF showed a significantly higher sevoflurane (selected anaesthetic) equilibrium adsorption capacity compared to the reference sample, although adsorption on the selected MOF did not take place on all active sites (i.e., it did not expose its coordinatively unsaturated sites). Moreover, sevoflurane adsorption on Cr-MOF was found to be fully reversible in the 283–328 K temperature range, and the adsorbent was fully regenerated by vacuum treatment at ambient temperature. The semiempirical Sips model was successfully used to fit sevoflurane adsorption data, substantially confirming the phenomenological aspects of the process inferable from the experimental results

Adsorption Behavior of Halogenated Anesthetic and Water Vapor on Cr‐Based MOF (MIL‐101) Adsorbent. Part I. Equilibrium and Breakthrough Characterizations

“…Furthermore, this Cr-MOF is stable in air and in various organic solvents at ambient temperature or under heating conditions [2]. Furthermore, this Cr-MOF is stable in air and in various organic solvents at ambient temperature or under heating conditions [2].…”

“…Among the available technologies for the treatment of emitted volatile anesthetics, those based on adsorption processes seems to be the most promising for reducing the emissions to the atmosphere by capturing the agents and recycling them [2]. Among the available technologies for the treatment of emitted volatile anesthetics, those based on adsorption processes seems to be the most promising for reducing the emissions to the atmosphere by capturing the agents and recycling them [2].…”

“…Porous materials such as silica gel, activated alumina, activated carbon, and zeolites have been conventionally used as adsorbents [2]. Doyle et al proved that using a high silica zeolite packed adsorption column was effective in removing 1 % isoflurane from exhaled, humidified gas containing CO 2 under simulated operating room conditions for a period of 6.5 h [5].…”

“…When an appropriate choice of metal groups and/or organic linkers is made, many different chemical structures can be obtained, usually with very large pore volumes and surface areas, thereby providing great potential to tailor their structure and carry out a specific application [2]. During the last 15 years, a new class of porous adsorbents called metal organic frameworks (MOFs) has been developed.…”

Sr-, Zn- and Cd-exchanged zeolitic materials as water vapor adsorbents for thermal energy storage applications

“…This is a model often used to deal with microporous materials, such as zeolites, for which a pore filling process controls adsorption phenomena. Unlike other theoretical isotherms, such as the Sips [34][35][36][37][38] or Toth one [39], the DA isotherm does not rely on entirely empirical expressions to describe the dependence of the maximum adsorption capacity and of the heterogeneity coefficient on temperature. Moreover, the DA model well describes the behavior of adsorbates, such as water vapor, which are characterized by strong molecular lateral interactions.…”